/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2013 Anish Gupta (akgupt3@gmail.com)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_extern.h>
#include "npt.h"
SYSCTL_DECL(_hw_vmm);
SYSCTL_NODE(_hw_vmm, OID_AUTO, npt, CTLFLAG_RW | CTLFLAG_MPSAFE, NULL,
NULL);
static int npt_flags;
SYSCTL_INT(_hw_vmm_npt, OID_AUTO, pmap_flags, CTLFLAG_RD,
&npt_flags, 0, NULL);
#define NPT_IPIMASK 0xFF
/*
* AMD nested page table init.
*/
int
svm_npt_init(int ipinum)
{
int enable_superpage = 1;
npt_flags = ipinum & NPT_IPIMASK;
TUNABLE_INT_FETCH("hw.vmm.npt.enable_superpage", &enable_superpage);
if (enable_superpage)
npt_flags |= PMAP_PDE_SUPERPAGE;
return (0);
}
static int
npt_pinit(pmap_t pmap)
{
return (pmap_pinit_type(pmap, PT_RVI, npt_flags));
}
struct vmspace *
svm_npt_alloc(vm_offset_t min, vm_offset_t max)
{
return (vmspace_alloc(min, max, npt_pinit));
}
void
svm_npt_free(struct vmspace *vmspace)
{
vmspace_free(vmspace);
}
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